使用cf大善人的服务

创建worker后把js粘贴到对应地方就行，在设置-触发器绑定自己域名（需要在cf的NS记录）

github:
github.876436.xyz

'use strict'

/**
 * static files (404.html, sw.js, conf.js)
 */
const ASSET_URL = 'https://hunshcn.github.io/gh-proxy/'
// 前缀，如果自定义路由为example.com/gh/*，将PREFIX改为 '/gh/'，注意，少一个杠都会错！
const PREFIX = '/'
// 分支文件使用jsDelivr镜像的开关，0为关闭，默认关闭
const Config = {
    jsdelivr: 0
}

const whiteList = [] // 白名单，路径里面有包含字符的才会通过，e.g. ['/username/']

/** @type {ResponseInit} */
const PREFLIGHT_INIT = {
    status: 204,
    headers: new Headers({
        'access-control-allow-origin': '*',
        'access-control-allow-methods': 'GET,POST,PUT,PATCH,TRACE,DELETE,HEAD,OPTIONS',
        'access-control-max-age': '1728000',
    }),
}


const exp1 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:releases|archive)\/.*$/i
const exp2 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:blob|raw)\/.*$/i
const exp3 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:info|git-).*$/i
const exp4 = /^(?:https?:\/\/)?raw\.(?:githubusercontent|github)\.com\/.+?\/.+?\/.+?\/.+$/i
const exp5 = /^(?:https?:\/\/)?gist\.(?:githubusercontent|github)\.com\/.+?\/.+?\/.+$/i
const exp6 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/tags.*$/i

/**
 * @param {any} body
 * @param {number} status
 * @param {Object<string, string>} headers
 */
function makeRes(body, status = 200, headers = {}) {
    headers['access-control-allow-origin'] = '*'
    return new Response(body, {status, headers})
}


/**
 * @param {string} urlStr
 */
function newUrl(urlStr) {
    try {
        return new URL(urlStr)
    } catch (err) {
        return null
    }
}


addEventListener('fetch', e => {
    const ret = fetchHandler(e)
        .catch(err => makeRes('cfworker error:\n' + err.stack, 502))
    e.respondWith(ret)
})


function checkUrl(u) {
    for (let i of [exp1, exp2, exp3, exp4, exp5, exp6]) {
        if (u.search(i) === 0) {
            return true
        }
    }
    return false
}

/**
 * @param {FetchEvent} e
 */
async function fetchHandler(e) {
    const req = e.request
    const urlStr = req.url
    const urlObj = new URL(urlStr)
    let path = urlObj.searchParams.get('q')
    if (path) {
        return Response.redirect('https://' + urlObj.host + PREFIX + path, 301)
    }
    // cfworker 会把路径中的 `//` 合并成 `/`
    path = urlObj.href.substr(urlObj.origin.length + PREFIX.length).replace(/^https?:\/+/, 'https://')
    if (path.search(exp1) === 0 || path.search(exp5) === 0 || path.search(exp6) === 0 || path.search(exp3) === 0 || path.search(exp4) === 0) {
        return httpHandler(req, path)
    } else if (path.search(exp2) === 0) {
        if (Config.jsdelivr) {
            const newUrl = path.replace('/blob/', '@').replace(/^(?:https?:\/\/)?github\.com/, 'https://cdn.jsdelivr.net/gh')
            return Response.redirect(newUrl, 302)
        } else {
            path = path.replace('/blob/', '/raw/')
            return httpHandler(req, path)
        }
    } else if (path.search(exp4) === 0) {
        const newUrl = path.replace(/(?<=com\/.+?\/.+?)\/(.+?\/)/, '@$1').replace(/^(?:https?:\/\/)?raw\.(?:githubusercontent|github)\.com/, 'https://cdn.jsdelivr.net/gh')
        return Response.redirect(newUrl, 302)
    } else {
        return fetch(ASSET_URL + path)
    }
}


/**
 * @param {Request} req
 * @param {string} pathname
 */
function httpHandler(req, pathname) {
    const reqHdrRaw = req.headers

    // preflight
    if (req.method === 'OPTIONS' &&
        reqHdrRaw.has('access-control-request-headers')
    ) {
        return new Response(null, PREFLIGHT_INIT)
    }

    const reqHdrNew = new Headers(reqHdrRaw)

    let urlStr = pathname
    let flag = !Boolean(whiteList.length)
    for (let i of whiteList) {
        if (urlStr.includes(i)) {
            flag = true
            break
        }
    }
    if (!flag) {
        return new Response("blocked", {status: 403})
    }
    if (urlStr.search(/^https?:\/\//) !== 0) {
        urlStr = 'https://' + urlStr
    }
    const urlObj = newUrl(urlStr)

    /** @type {RequestInit} */
    const reqInit = {
        method: req.method,
        headers: reqHdrNew,
        redirect: 'manual',
        body: req.body
    }
    return proxy(urlObj, reqInit)
}


/**
 *
 * @param {URL} urlObj
 * @param {RequestInit} reqInit
 */
async function proxy(urlObj, reqInit) {
    const res = await fetch(urlObj.href, reqInit)
    const resHdrOld = res.headers
    const resHdrNew = new Headers(resHdrOld)

    const status = res.status

    if (resHdrNew.has('location')) {
        let _location = resHdrNew.get('location')
        if (checkUrl(_location))
            resHdrNew.set('location', PREFIX + _location)
        else {
            reqInit.redirect = 'follow'
            return proxy(newUrl(_location), reqInit)
        }
    }
    resHdrNew.set('access-control-expose-headers', '*')
    resHdrNew.set('access-control-allow-origin', '*')

    resHdrNew.delete('content-security-policy')
    resHdrNew.delete('content-security-policy-report-only')
    resHdrNew.delete('clear-site-data')

    return new Response(res.body, {
        status,
        headers: resHdrNew,
    })
}

docker：
docker.876436.xyz

const HTML = `
<!DOCTYPE html>
<html lang="zh-CN">
<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>Dockerhub镜像加速说明</title>
 <style>
     body {
         font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
         line-height: 1.6;
         color: #333;
         margin: 0;
         padding: 20px;
         background-image: url('https://cdn.jsdelivr.net/gh/fireinrain/picx-images-hosting@master/20240608/wp8114669-docker-wallpapers.5h6dvj56isg0.webp'); /* Replace with your image path */
         background-size: cover;
         background-position: center;
         background-repeat: no-repeat;
         background-attachment: fixed;
     }
     .container {
         max-width: 800px;
         margin: 0 auto;
         padding: 20px;
         background: rgba(255, 255, 255, 0.8);
         border-radius: 8px;
         box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
     }
     h1 {
         font-size: 2em;
         margin-bottom: 0.5em;
         color: #007aff;
     }
     p {
         margin-bottom: 1em;
     }
     pre {
         background: #2d2d2d;
         color: #f8f8f2;
         padding: 20px;
         border-radius: 8px;
         overflow-x: auto;
         position: relative;
     }
     pre::before {
         content: " ";
         display: block;
         position: absolute;
         top: 10px;
         left: 10px;
         width: 12px;
         height: 12px;
         background: #ff5f56;
         border-radius: 50%;
         box-shadow: 20px 0 0 #ffbd2e, 40px 0 0 #27c93f;
     }
     code {
         font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
         font-size: 0.875em;
     }
     .copy-button {
         position: absolute;
         top: 10px;
         right: 10px;
         background: #007aff;
         color: white;
         border: none;
         padding: 5px 10px;
         border-radius: 5px;
         cursor: pointer;
         opacity: 0;
         transition: opacity 0.3s;
     }
     pre:hover .copy-button {
         opacity: 1;
     }
</style>
</head>
<body>
 <div class="container">
     <center><h1>镜像加速说明</h1></center>
     <h3>为了加速镜像拉取，你可以使用以下命令设置 registry mirror:</h3>
     <pre><code>
sudo tee /etc/docker/daemon.json <<EOF
{
 "registry-mirrors": ["https://docker.yourdomain.workers.dev"]
}
EOF</code><button class="copy-button" onclick="copyCode(this)">复制代码</button></pre>
     <h3>用法:</h3>
     <p>原拉取镜像命令</p>
     <pre><code>
docker pull library/alpine:latest</code><button class="copy-button" onclick="copyCode(this)">复制代码</button></pre>
     <h3>加速拉取镜像命令</h3>
     <pre><code>
docker pull 你的域名/library/alpine:latest</code><button class="copy-button" onclick="copyCode(this)">复制代码</button></pre>
 </div>
 <script>
     function copyCode(button) {
         const code = button.previousSibling;
         const textArea = document.createElement('textarea');
         textArea.value = code.textContent;
         document.body.appendChild(textArea);
         textArea.select();
         document.execCommand('copy');
         document.body.removeChild(textArea);
         button.textContent = '已复制';
         setTimeout(() => {
             button.textContent = '复制代码';
         }, 2000);
     }
</script>
</body>
</html>
`;

async function handleRequest(request) {
  const url = new URL(request.url);

  // Redirect to HTTPS if the request is not secure
  if (url.protocol !== "https:") {
   url.protocol = "https:";
   return Response.redirect(url.toString(), 301);
  }

  const path = url.pathname;
  const originalHost = request.headers.get("host");
  const registryHost = "registry-1.docker.io";

  if (path.startsWith("/v2/")) {
   const headers = new Headers(request.headers);
   headers.set("host", registryHost);

   const registryUrl = `https://${registryHost}${path}`;
   const registryRequest = new Request(registryUrl, {
       method: request.method,
       headers: headers,
       body: request.body,
       redirect: "follow",
   });

   const registryResponse = await fetch(registryRequest);

   const responseHeaders = new Headers(registryResponse.headers);
   responseHeaders.set("access-control-allow-origin", originalHost);
   responseHeaders.set("access-control-allow-headers", "Authorization");

   return new Response(registryResponse.body, {
       status: registryResponse.status,
       statusText: registryResponse.statusText,
       headers: responseHeaders,
   });
  } else {
   // Replace docker.yourdomain.workers.dev with the current visiting domain
   const replacedHTML = HTML.replaceAll('docker.yourdomain.workers.dev', originalHost);
   
   // Remove background-image from btn-copy buttons
   const modifiedHTML = replacedHTML.replace(/background-image:\s*url\(.*?\)/g, '');

   return new Response(modifiedHTML, {
       status: 200,
       headers: {
           "content-type": "text/html"
       }
   });
  }
}

addEventListener("fetch", event => {
  event.respondWith(handleRequest(event.request));
});